Limits...
Over 95% of large-scale length uniformity in template-assisted electrodeposited nanowires by subzero-temperature electrodeposition.

Shin S, Kong BH, Kim BS, Kim KM, Cho HK, Cho HH - Nanoscale Res Lett (2011)

Bottom Line: Even with highly disordered commercial porous anodic aluminum oxide template and conventional potentiostatic electrodeposition, length uniformity over 95% can be achieved when the deposition temperature is lowered down to -2.4°C.Decreased diffusion coefficient and ion concentration gradient due to the lowered deposition temperature effectively reduces ion diffusion rate, thereby favors uniform nanowire growth.Moreover, by varying the deposition temperature, we show that also the pore nucleation and the crystallinity can be controlled.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, Yonsei University, Seoul, 120-749, Korea. hhcho@yonsei.ac.kr.

ABSTRACT
In this work, we report highly uniform growth of template-assisted electrodeposited copper nanowires on a large area by lowering the deposition temperature down to subzero centigrade. Even with highly disordered commercial porous anodic aluminum oxide template and conventional potentiostatic electrodeposition, length uniformity over 95% can be achieved when the deposition temperature is lowered down to -2.4°C. Decreased diffusion coefficient and ion concentration gradient due to the lowered deposition temperature effectively reduces ion diffusion rate, thereby favors uniform nanowire growth. Moreover, by varying the deposition temperature, we show that also the pore nucleation and the crystallinity can be controlled.

No MeSH data available.


Linear voltammograms of the Cu nanowires under varying temperature. The scan rate is 0.1 V/s.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211979&req=5

Figure 1: Linear voltammograms of the Cu nanowires under varying temperature. The scan rate is 0.1 V/s.

Mentions: Prior to conduct potentiostatic electrodeposition, linearvoltametry was employed with scan rate of 0.1 V/s to investigate the appropriate reduction potential range of the Cu nanowires. Figure 1 shows the measured linear voltammogram. The results show that the temperature does not critically affect the Cu reduction potential which is in good agreement with previous study [24]. Reduction peak of Cu occurred in the range of 0.02 V to approximately 0.1 V. Therefore, we fixed the applied potential at 0.05 V and conducted potentiostatic electrodeposition throughout the whole temperature range.


Over 95% of large-scale length uniformity in template-assisted electrodeposited nanowires by subzero-temperature electrodeposition.

Shin S, Kong BH, Kim BS, Kim KM, Cho HK, Cho HH - Nanoscale Res Lett (2011)

Linear voltammograms of the Cu nanowires under varying temperature. The scan rate is 0.1 V/s.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211979&req=5

Figure 1: Linear voltammograms of the Cu nanowires under varying temperature. The scan rate is 0.1 V/s.
Mentions: Prior to conduct potentiostatic electrodeposition, linearvoltametry was employed with scan rate of 0.1 V/s to investigate the appropriate reduction potential range of the Cu nanowires. Figure 1 shows the measured linear voltammogram. The results show that the temperature does not critically affect the Cu reduction potential which is in good agreement with previous study [24]. Reduction peak of Cu occurred in the range of 0.02 V to approximately 0.1 V. Therefore, we fixed the applied potential at 0.05 V and conducted potentiostatic electrodeposition throughout the whole temperature range.

Bottom Line: Even with highly disordered commercial porous anodic aluminum oxide template and conventional potentiostatic electrodeposition, length uniformity over 95% can be achieved when the deposition temperature is lowered down to -2.4°C.Decreased diffusion coefficient and ion concentration gradient due to the lowered deposition temperature effectively reduces ion diffusion rate, thereby favors uniform nanowire growth.Moreover, by varying the deposition temperature, we show that also the pore nucleation and the crystallinity can be controlled.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, Yonsei University, Seoul, 120-749, Korea. hhcho@yonsei.ac.kr.

ABSTRACT
In this work, we report highly uniform growth of template-assisted electrodeposited copper nanowires on a large area by lowering the deposition temperature down to subzero centigrade. Even with highly disordered commercial porous anodic aluminum oxide template and conventional potentiostatic electrodeposition, length uniformity over 95% can be achieved when the deposition temperature is lowered down to -2.4°C. Decreased diffusion coefficient and ion concentration gradient due to the lowered deposition temperature effectively reduces ion diffusion rate, thereby favors uniform nanowire growth. Moreover, by varying the deposition temperature, we show that also the pore nucleation and the crystallinity can be controlled.

No MeSH data available.